CN110260301A - The energy-saving biomass recirculating fluidized bed boiler of minimum discharge - Google Patents
The energy-saving biomass recirculating fluidized bed boiler of minimum discharge Download PDFInfo
- Publication number
- CN110260301A CN110260301A CN201910651405.4A CN201910651405A CN110260301A CN 110260301 A CN110260301 A CN 110260301A CN 201910651405 A CN201910651405 A CN 201910651405A CN 110260301 A CN110260301 A CN 110260301A
- Authority
- CN
- China
- Prior art keywords
- air
- furnace
- burner hearth
- wall
- branch pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002028 Biomass Substances 0.000 title claims abstract description 51
- 230000003134 recirculating effect Effects 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 80
- 238000002485 combustion reaction Methods 0.000 claims abstract description 77
- 239000012528 membrane Substances 0.000 claims abstract description 63
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000010899 nucleation Methods 0.000 claims abstract description 21
- 239000011230 binding agent Substances 0.000 claims abstract description 19
- 238000000926 separation method Methods 0.000 claims abstract description 19
- 238000007598 dipping method Methods 0.000 claims description 50
- 238000001816 cooling Methods 0.000 claims description 34
- 238000009826 distribution Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000009423 ventilation Methods 0.000 claims description 20
- 210000000038 chest Anatomy 0.000 claims description 15
- 239000004033 plastic Substances 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 14
- 238000005243 fluidization Methods 0.000 claims description 9
- 239000004071 soot Substances 0.000 claims description 9
- 239000003507 refrigerant Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 235000019504 cigarettes Nutrition 0.000 claims description 4
- 230000003009 desulfurizing effect Effects 0.000 claims description 4
- 241000826860 Trapezium Species 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 23
- 231100000719 pollutant Toxicity 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 22
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000005299 abrasion Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 230000009467 reduction Effects 0.000 abstract description 6
- 238000010304 firing Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 83
- 239000000446 fuel Substances 0.000 description 64
- 239000007789 gas Substances 0.000 description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 20
- 239000003546 flue gas Substances 0.000 description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000000428 dust Substances 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 238000004939 coking Methods 0.000 description 9
- 239000003245 coal Substances 0.000 description 8
- 238000013461 design Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 7
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 238000013517 stratification Methods 0.000 description 7
- 229910052783 alkali metal Inorganic materials 0.000 description 6
- 150000001340 alkali metals Chemical class 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 101000793686 Homo sapiens Azurocidin Proteins 0.000 description 5
- 206010020843 Hyperthermia Diseases 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 230000036031 hyperthermia Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003500 flue dust Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000002459 sustained effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004177 carbon cycle Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001535 kindling effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001706 oxygenating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002510 pyrogen Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
- F22B31/0015—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
- F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
- F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses the energy-saving biomass recirculating fluidized bed boilers of minimum discharge, including drum, full film type wall burner hearth, fluidized bed combustion chamber, separation revert system and tail vertical well gas flue, full film type wall lower furnace portion is by being that the three-stage evagination of membrane wall allows pipe structure and fluidized bed combustion chamber top to connect, three-stage evagination allows the prepattern wall of pipe structure and rear membrane wall to be provided with secondary air inlet structure, and the feed that three-stage evagination allows the prepattern wall of pipe structure to be provided with the air-cooled structure with material seeding wind and binder wind is taken over.The present invention has good from deashing characteristic, to avoid the corrosion to heating surface, mitigate the abrasion of heating surface, also the biomass bulk cargo into burner hearth is made to catch fire rapidly, overheavy firing effect is conducive to after-flame, improve boiler thermal efficiency, so that boiler is had both pollutant from removal performance simultaneously, realizes emission reduction in pollutant furnace from burning source, realize boiler minimum discharge, low energy consumption, sunken bed pressure, low abrasion, efficient burning and stable operation.
Description
Technical field
The invention belongs to Sector of Cfb Boilers, and in particular to a kind of pure biomass bulk cargo that directly burns surpasses
Low-emission and energy-saving type biomass recirculating fluidized bed boiler.
Background technique
Since biomass fuel has the particularity of its own, there are many technical difficulty during utilization for biomass bulk cargo.
The characteristics of biomass solid fuel and coal facies ratio, component is distributed is " three high three is low ", i.e., volatile matter, oxygen and hydrogen content are very high,
First two are significantly larger than coal, and the content of carbon, sulphur and ash is then relatively low, and SiO in ash2And K2O and Na2The content of O is obvious
It is high；And there is carbon cycle (CO2Zero-emission) feature.Simultaneously as biomass fuel is collected and the difference of region and season, lead
Cause the fluctuation of moisture in fuel very big, moisture content is differed from 10% to 60%.Exist centainly additionally, due in biomass fuel
Alkali metal element and alkali earth metal, ash fusion point reduces in combustion, easily leads to bed material and bonds and coking and tail portion
The dust stratification of heating surface bonds, and causes etching problem.And the bulk density and calorific value of biomass bulk cargo be much smaller than coal, easily cause to
Material is difficult and the big situation of fuel quantity, these problems restrict the development and popularization of biomass direct-fired recirculating fluidized bed, therefore fuel
Difference determines the particularity of biomass boiler burning and structure and operation.
Existing biomass direct-fired circulating fluidized bed boiler is on the basis of existing coal-burning boiler, for biology mostly
Matter aptitude to burn is modified, but does not get rid of fire coal circulating fluid bed traditional structure still on the whole, is primarily present following ask
Topic:
1) in terms of biomass feeding, conventional bevel formula coal-feeding tube positive pressure feeding structure is still used, feed end entrance is still arranged
In furnace combustion zone lower part close to the position of siege air distribution plate, only increase feeding coal by increasing feed pipe size, the feed
Region is the higher barotropic field of burner hearth, since the specific gravity of biomass bulk cargo is small and easy kindling, is easy to appear positive pressure flue gas and returns and alter
Blocking, can not the unsmooth phenomenon of the feed such as blanking, while also easily there is fuel in feed combustion inner pipe phenomenon, influence boiler safety.
2) Secondary Air is still arranged near material inlet, and the top of material inlet, distance are arranged in frequently with single layer arragement construction
Siege is closer, and Secondary Air does not have material seeding function to furnace fuel is entered, and allocation of the amount of air designs unreasonable, the combustion with biomass bulk cargo
It burns characteristic to mismatch, causes the burning of lower furnace portion combustion zone acutely, ignition temperature is higher, Yi Fasheng bed material coking situation, and
The combustion share of upper furnace is few, and ignition temperature is low, and burnout rate is low, and boiler efficiency is lower.
3) back-end surfaces still use the mentality of designing of coal-burning boiler, and heating surface, which mostly uses, to be staggered in arrangement and using higher
Flue gas flow rate, heating surface allowance is small, and the cohesiveness ash that biomass combustion generates, which is easy to be bonded on heating surface pipe, causes dust stratification
It puts up a bridge, easy-clear, does not cause boiler to be unable to satisfy design parameter, and operational effect is poor.
4) burner hearth, feed and Secondary Air arrangement are unreasonable, and gas flow rate is high in burner hearth, and the fuel residence time is short, easily causes
The local accumulation and generation localized hyperthermia's combustion case of fuel, low-temperature burning effect is poor, temperature water adjustment on furnace height direction
It is different big, while poor, the SO from desulfurization and from denitration effect of desulfuration in furnace and particle2It is more with the amount of being initially generated of NOx, at the beginning of pollutant
Beginning discharge amount is high, is unable to reach the environmental requirement of minimum discharge.
Summary of the invention
For the present invention in order to solve shortcoming in the prior art, providing one kind can solve existing biomass circulating fluidized bed
Boiler feed is unsmooth, burnout rate is low, thermal efficiency low and high energy consumption, poor, the pollutant initial ejection concentration height of low-temperature burning effect etc. are asked
The energy-saving biomass recirculating fluidized bed boiler of the minimum discharge of topic.
In order to solve the above technical problems, the present invention adopts the following technical scheme: the energy-saving biomass circulating stream of minimum discharge
Fluidized bed boiler, including drum, full film type wall burner hearth, fluidized bed combustion chamber, separation revert system and tail vertical well gas flue, full membrane type
Fireplace thorax internal upper part is provided with furnace water cooling screen and pendant superheater, and the top of full film type wall burner hearth is arranged in drum, and separation is returned
The lower part of material system and the rear side of fluidized bed combustion chamber connect, and the top for separating revert system passes through burner hearth exhanst gas outlet and full film
The upper back of formula fireplace thorax connects, and the top of tail vertical well gas flue passes through offset central tube and the top that separates revert system
Connection, fluidized bed combustion chamber bottom is provided with an air compartment, igniter, full film type wall burner hearth is provided on rear side of an air compartment
By being that the three-stage evagination of membrane wall allows at the top of pipe structure and fluidized bed combustion chamber and connect, three-stage evagination allows pipe knot for lower part
The prepattern wall and rear membrane wall of structure are provided with secondary air inlet structure, and three-stage evagination allows the prepattern wall of pipe structure to be provided with tool
There is the feed of the air-cooled structure of material seeding wind and binder wind to take over.
Three-stage evagination allows pipe structure to make full film type wall to external bending by the pipe of full film type wall lower furnace portion surrounding
Lower furnace portion, which outwardly protrudes, to be formed upper section oblique straight pipe beam, middle section and restrains vertically and lower section oblique straight pipe beam, and upper section oblique straight pipe beam is in interior
High outer low dip setting, lower section oblique straight pipe beam are obliquely installed in high outside and low outside, and middle section restrains be parallel to full film type wall burner hearth vertically
Center line, the included angle A of the center line of the upper section oblique straight pipe beam being connected with prepattern wall and rear membrane wall and full film type wall burner hearth
It is 15-20 °, the angle of the center line of the lower section oblique straight pipe beam being connected with prepattern wall and rear membrane wall and full film type wall burner hearth
B is 8-15 °, the center line of the upper section oblique straight pipe beam and lower section oblique straight pipe beam being connected with side membrane wall and full film type wall burner hearth
Included angle A is 15-20 °, and it is 70-110mm that the horizontal distance L between the pipe of full film type wall burner hearth is restrained in middle section vertically.
The prepattern wall middle and lower part restrained vertically in middle section is arranged in feed adapter tube, and in the front is high and the back is low, inclination is set feed adapter tube
It setting, the angle C of the center line and horizontal plane that are fed adapter tube is 10-30 °, it is fed the front port connection direct-push batcher of adapter tube,
The tube wall rear interior of feed adapter tube is provided with the air-cooled cavity of annular, and the tube wall upper and lower part for being fed adapter tube offers respectively
The binder wind ventilation hole and material seeding wind ventilation hole being connected to inside full film type wall burner hearth, binder wind ventilation hole and material seeding wind ventilation hole
Center line the front is high and the back is low is obliquely installed, feed adapter tube front side is provided with the outer air duct being connected to air-cooled cavity inside and connects
Mouthful.
Secondary air inlet structure includes that secondary hot-air is responsible for, several upper layer secondary hot-airs enter furnace branch pipe and several lower layers two
Secondary hot wind enters furnace branch pipe, and upper layer secondary hot-air enters the prepattern wall that furnace branch pipe is restrained vertically along middle section and rear membrane wall is contour and equal
Even arrangement, it is contour along the prepattern wall of fluidized bed combustion chamber and rear membrane wall and be evenly arranged that lower layer's secondary hot-air enters furnace branch pipe,
Upper layer secondary hot-air enters furnace branch pipe and lower layer's secondary hot-air enter furnace branch pipe and be in it is high outside and low outside be obliquely installed, upper layer secondary hot-air enters
Furnace branch pipe and lower layer's secondary hot-air, which enter the outer end of furnace branch pipe, to be responsible for secondary hot-air and connects, upper layer secondary hot-air enter furnace branch pipe and
Lower layer's secondary hot-air enters the conical nozzle structure for entering furnace end and using the outer imperial palace of variable cross-section small of furnace branch pipe, before feed adapter tube is located at
The upper layer secondary hot-air of membrane wall enters furnace branch pipe and lower layer's secondary hot-air enters between furnace branch pipe, and the upper layer of feed adapter tube top is secondary
Hot wind enter furnace branch pipe enter furnace port and feed take over into furnace port center vertical range H1 be 0.8-2.5m, feed adapter tube
The vertical range H2 for entering furnace port and being fed adapter tube inner port center that lower layer's secondary hot-air of lower section enters furnace branch pipe is 0.8-
2.5m, upper layer secondary hot-air enters furnace branch pipe and lower layer's secondary hot-air enters to be provided with independent expansion joint and air quantity tune on furnace branch pipe
Save valve；The outer end that section bottom secondary hot-air enters furnace branch pipe is provided with material-feeding port, desulfurizing agent entrance and peephole with center line；
The outer end that section top secondary hot-air enters furnace branch pipe is provided with peephole with center line；
Total actual internal area that lower layer's secondary hot-air enters the conical nozzle structure of furnace branch pipe is greater than upper layer Secondary Air and enters furnace branch pipe
Total actual internal area of conical nozzle structure, lower layer's secondary hot-air enters furnace branch pipe and upper layer Secondary Air enters furnace branch pipe along furnace width
Direction is uniformly and interlaced arrangement, secondary hot-air enter the hot wind flow control of the conical nozzle outlet of furnace branch pipe in 50-80m/s.
The rear portion of full film type wall burner hearth is arranged in separation revert system, and separation revert system includes separator, separator bottom
Portion is connected to by refeed line with fluidized bed combustion chamber lower rearward side, is provided with self-balancing returning charge valve on refeed line, separator it is upper
Dipping type chimney intake is provided on front side of portion in tangential direction, dipping type chimney intake is in front wide and rear narrow and what the front is high and the back is low has a down dip
The flat high shape of formula narrow slot, dipping type chimney intake front end are connect with burner hearth exhanst gas outlet, the top of dipping type chimney intake rear end
Portion and bottom tilt down certain angle and are parallel to each other, and the angle of the dipping type chimney intake and horizontal plane is 5-10 °.
Burner hearth exhanst gas outlet is the horizontal outer dipping type film being drawn into of the water pipe in the rear membrane wall of full film type wall burner hearth
Formula water-cooled flue, the vertical cross-section of dipping type film-type water-cooling flue along the longitudinal direction are that bottom edge is under high and bottom edge holding is horizontal
Formula of inclining ladder structure of right angle, top margin and the inclination at the top of dipping type chimney intake of ladder structure of right angle are consistent, dipping type
The two sides of film-type water-cooling flue be the flat high shape of dipping type pre-large post-small, front wide and rear narrow and that the front is high and the back is low and with dipping type cigarette
Import inclination arrangement in road is consistent, and the bottom of dipping type film-type water-cooling flue and dipping type chimney intake is provided with accumulatingdust
Hole, accumulatingdust hole lower section have been arranged in juxtaposition accumulatingdust fluidisation air piping, have offered in each accumulatingdust fluidisation air piping towards anti-product
The stomata of grey hole injection.
Superheater, high-temperature economizer, denitration installation space, low temperature are disposed in tail vertical well gas flue from top to bottom to save
Coal device and air preheater are respectively provided in the effective range on every grade of heating surface top of tail vertical well gas flue and connect equipped with soot blower
Mouthful.
Full film type wall upper furnace cross section is the rectangular configuration that breadth depth ratio is greater than 1.5, and the bottom of fluidized bed combustion chamber is set
It is equipped with air distribution plate, the prepattern wall and rear membrane wall of fluidized bed combustion chamber make cloth wind to furnace contract from top to bottom with certain inclination angle
The surface area of plate accounts for 0.3-0.45 times of upper furnace rectangular configuration cross-sectional area, and air distribution plate is equipped with the small wind of cylindricality of anti-ash discarding
Cap makes the ignition temperature in full film type wall burner hearth control the temperature range at 720-800 DEG C；Air distribution plate, which is provided with to have, discloses slag function
Can scum pipe, wear an air compartment under scum pipe and extend to the lower outer of an air compartment.
Upper section oblique straight pipe beam, middle section restrain vertically and the heating surface pipe of lower section oblique straight pipe beam be welded with to fiery position it is close
Collection pin simultaneously coats certain thickness corrosive-proof plastic material progress wear resistant heat preserving protection, corrosive-proof plastic material surface and upper furnace light pipe
Round and smooth no convex transitional.
High-temperature economizer uses higher refrigerant flow rate, refrigerant flow rate >=0.8m/s；Air preheater is using corrosion-resistant
Material is made；The First air for being passed through an air compartment accounts for the 35-45% into full film type wall burner hearth total blast volume, is passed through feed adapter tube
Feed wind accounts for the 5-10% into full film type wall burner hearth total blast volume, and the Secondary Air for being passed through secondary hot-air supervisor is accounted for into full membrane type
The 45-60% of fireplace thorax total blast volume.
By adopting the above technical scheme, the invention has the following advantages:
The present invention is using Design of State theory is determined, by fluidised form reconstructing method, for the particularity of biomass bulk cargo direct combustion, boiler
Have chosen biggish furnace height and burner hearth cross-sectional area in design, and by arrangement furnace water cooling screen and pendant superheater come
The heating surface area inside full film type wall burner hearth is increased, then is equipped with efficient cyclone separator, to reduce the combustion in Matter Transfer circuit
Burn temperature, and control at 760 DEG C or so, with prevent material coking and furnace internal heating surface dust stratification cause inside full film type wall burner hearth by
The alkali metal in hot face corrodes, and the flue gas superficial velocity of the upper rectangular area in full film type wall burner hearth is between 3-4.5m/s, really
Material apparent residence time >=4.5s in furnace is protected, after-flame is conducive to, improves boiler combustion efficiency.The full film of circulating fluidized bed boiler
There are a large amount of recycle stocks inside formula fireplace thorax, wash away to heating surface surface, have good from deashing characteristic, can prevent
The only slagging of the water wall surface of full film type wall burner hearth, furnace water cooling screen and pendant superheater to avoid corroding, and shields formula
The setting of superheater also makes full use of the characteristics of its heat exchange amount is with internal circulating load and fluidized bed combustion chamber temperature change, makes boiler load
Steam parameter keeps stablizing when large-scope change, improves the underrun ability of boiler.
Pipe structure is allowed by the way that three-stage evagination is arranged, and feed adapter tube (biomass feeding mouth) and upper layer secondary hot-air is made to enter furnace
Branch pipe can be arranged in the vertical bundle region in middle section, and make the corrosive-proof plastic material in the region and the anti-wear plastic of furnace combustion zone
Material and upper furnace are formed without raised natural transition, prevent the vortex of upper furnace light pipe membrane wall juncture area from wearing, simultaneously
Also upper layer secondary hot-air is made to enter the spout of furnace branch pipe far from the interface, to prevent making because of the disturbance of the addition of feed and Secondary Air
The abrasion of pairs of full film type wall upper furnace light pipe membrane wall, while making to bore containing for section variable cross-section from full film type wall lower furnace portion
Cloud of dust gas is further mixed to flow through in larger evagination rectangular-section void (three-stage evagination allow pipe structure) and be crossed herein, and makes portion
Divide flue dust and feed separation, to mitigate the abrasion to full film type wall furnace heating surface, while also making biomass feeding mouth region domain
Form widened relatively-high temperature area space because of the covering of resistance to material, enable into the fuel of full film type wall burner hearth it is dry rapidly and
Fire burning, overheavy firing effect are conducive to after-flame, improve the utilization rate of fuel.
Upper layer secondary hot-air enters furnace branch pipe and lower layer's secondary hot-air enters furnace branch pipe using layered arrangement and by independent tune
Wind apparatus is respectively separately adjustable to realize, and uses conical nozzle structure entering furnace end to improve jeting effect, enhancing second heat
Pneumatic amount strengthens disturbance and oxygenating efficiency, and reduces secondary hot-air and enter furnace branch resistance to reduce energy consumption.Upper layer secondary hot-air enters
Furnace branch pipe and lower layer's secondary hot-air enter furnace branch pipe three-stage evagination allow pipe structural region prepattern wall and rear membrane wall above and below
Secondary hot-air is simultaneously precisely filled into corresponding burning oxygen-depleted zone by sustained height position, is strengthened the air feed of full film type wall upper furnace, is made
The combustion share of full film type wall upper furnace is redistributed again, further improves burning part of full film type wall upper furnace
Volume, and disturbance mixed effect of the enhanced fuel in full film type wall burner hearth, make fuel and chamber flue gas temperature in full film type wall furnace
It is more evenly distributed in thorax, prevents local burnup's accumulation and local high-temp combustion, cause local coking and full film type wall burner hearth
Heating surface is hung burnt and weakens desulfurization off sulfide effect, and effectively extends stop burning time of the material in full film type wall burner hearth, mentions
The burn-off rate of high fuel, is effectively reduced SO2With the amount of being initially generated of NOx and further strengthen pollutant from removal performance, improves
Boiler efficiency and pollutant minimum discharge environment protecting.Lower layer's Secondary Air enters the lower section that furnace branch pipe is located at material inlet, further
Fuel is uniformly sent out to prevent local accumulation, had both supplemented air and strengthened disturbance mixing, and reduced the fuel quantity on air distribution plate, it is more sharp
In fuel combustion.And upper layer secondary hot-air enters furnace branch pipe and lower layer's secondary hot-air enters with expansion joint on furnace branch pipe, to meet
Expanding needs between full film type wall burner hearth and secondary air inlet structure.
Before being fed air-cooled structure of the setting with binder wind ventilation hole and material seeding wind ventilation hole inside the tube wall of adapter tube and being in
Low dip is arranged after height, while being arranged near full film type wall burner hearth flue gas neutral point.Material seeding wind in feed adapter tube, by fuel
It pushes, fuel is uniformly sent out to prevent local accumulation toward furnace depth direction, both supplemented air and strengthened mixing, it is fast to be conducive to fuel
Quick burning is burnt, and also effectively prevent being fed adherent inflow full film type wall burner hearth and causing extension burnt being fed localized hyperthermia's burning near adapter tube
And operational safety is influenced, while can also mitigate influence of the feed adapter tube lower part flue gas positive pressure to feed, make to be fed more blocking-resistant safety；
The binder wind being passed through in feed adapter tube then effectively prevent the fine grained in furnace fuel to drift about upwards, strengthens material whereabouts trend,
Extend particle residence time, is conducive to after-flame.The air-cooled cavity also plays cooling work to direct-push batcher and feed adapter tube simultaneously
With playing prevents fuel premature combustion, plays a good protective effect to direct-push batcher.
Separator uses the thermal insulation cyclone separator of offset central tube, and the tangential chimney intake of separator is in preceding height
The flat high shape of low dipping type narrow slot and accumulatingdust hole is set afterwards, strengthens material and be concentrated and prevent dust deposit in flue, realize efficiently
Separation, conducive to fuel low-temperature burning and burn, improve efficiency of combustion, reduce being initially generated and strengthening recycle stock for pollutant
Pollutant autospasy removing solid capacity, the more conducively minimum discharge of pollutant can also effectively reduce bed material increment, maintain normal bed
Pressure and Matter Transfer and full film type wall Heat Transfer in Furnace demand.
According to biomass fuel characteristic, to a Secondary Air, feed wind and enter the accounting of full film type wall burner hearth total blast volume into
Row distribution, First air accounting 35-45% are fed wind system accounting 5-10%, Secondary Air accounting 45-60%, and propose preferred design
Scheme can be good at being adapted with biomass fuel high volatile, low ignition temperature and smaller air distribution plate area.Fluidized bed combustion
It burns room and desulfuration in furnace agent entrance is set, the denitration installation of appropriate location setting NO_x Reduction by Effective mode also in tail vertical well gas flue
Space, then be equipped with thermal insulation cyclone separator, it is ensured that the low energy consumption of biomass circulating fluidized bed, efficient burning and pollutant
Minimum discharge performance.
Tail portion superheater, economizer and Air Preheater Heating Surface are using wide pitch, in-line, low flow velocity arrangement, flue gas stream
Speed≤8.5m/s effectively prevent dust stratification between pipe to put up a bridge, and uses big margin design to heating surface, to weaken because fouling of heating surface is led
Pyrogenicity utilization rate reduces the influence to boiler parameter, is more convenient for deashing also to improve heating surface utilization rate.High-temperature economizer simultaneously
Using higher refrigerant flow rate, air preheater uses resistant material, keeps boiler operatiopn safer.Also in tail vertical well cigarette
It is respectively provided with soot blower interface in the effective range on every grade of heating surface top in road, is equipped with suitable slag-blowing equipmemt, selective sootblowing,
Effective deashing, it is ensured that soot blowing effect improves heating surface utilization rate.
Using Design of State theory is determined, by fluidised form reconstructing method, for the particularity of biomass bulk cargo direct combustion, improvement is given
Material mode improves the structures such as burner hearth, secondary air and separator, and overheavy firing improves boiler efficiency, reduces energy consumption, and from combustion
Burning source reduces the production quantity of the pollutants such as sulfide and nitrogen oxides, strengthens pollutant autospasy removing solid capacity in furnace, keeps boiler simultaneous
Have pollutant from removal performance, realize emission reduction in pollutant furnace, the sulfide and discharged nitrous oxides for generating burning obviously drop
Low, the initial ejection concentration of pollutant directly reaches SO2≤35mg/m3(standard state) and NOx≤50mg/m3The ultralow row of (standard state)
Standard requirements are put, boiler minimum discharge, low energy consumption, sunken bed pressure, low abrasion, efficient burning and stable operation are realized.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 be in Fig. 1 three-stage evagination allow pipe structure enlarged drawing (left side be connected with prepattern wall or rear membrane wall cut
Face, right side are the section being connected with side membrane wall)；
Fig. 3 is the enlarged drawing that adapter tube is fed in Fig. 1；
Fig. 4 is the enlarged drawing of secondary air inlet structure front side portion in Fig. 1；
Fig. 5 is that dipping type film-type water-cooling flue and dipping type chimney intake are put between separator and full film type wall burner hearth in Fig. 1
Big figure.
Specific embodiment
As Figure 1-Figure 5, the energy-saving biomass recirculating fluidized bed boiler of minimum discharge of the invention, including it is drum 1, complete
Membrane wall burner hearth 2, fluidized bed combustion chamber 3, separation revert system and tail vertical well gas flue 4, the setting of 2 internal upper part of full film type wall burner hearth
There are furnace water cooling screen 5 and pendant superheater 6, the top of full film type wall burner hearth 2 is arranged in drum 1, separates the lower part of revert system
It is connect with the rear side of fluidized bed combustion chamber 3, the top for separating revert system passes through burner hearth exhanst gas outlet and full film type wall burner hearth 2
The top of upper back connection, tail vertical well gas flue 4 is connected by offset central tube 8 with the top for separating revert system, stream
3 bottom of fluidized bed combustion room is provided with an air compartment 9, and the rear side of an air compartment 9 is provided with igniter 10, full film type wall burner hearth 2
Lower part is allowed at the top of pipe structure 11 and fluidized bed combustion chamber 3 by three-stage evagination and is connected, and three-stage evagination allows before pipe structure 11
Membrane wall and rear membrane wall are provided with secondary air inlet structure 12, and three-stage evagination, which allows the prepattern wall of pipe structure 11 to be provided with, to be had
The feed adapter tube 13 of the air-cooled structure of material seeding wind and binder wind.
Three-stage evagination allows pipe structure 11 to make full membrane type to external bending by the pipe of 2 lower part surrounding of full film type wall burner hearth
2 lower part of fireplace thorax outwardly protrudes and to form upper section oblique straight pipe beam 14,15 and lower section oblique straight pipe beam 16 are restrained in middle section vertically, and upper section is tiltedly straight
Tube bank 14 is obliquely installed in low inside and high outside, and lower section oblique straight pipe beam 16 is obliquely installed in high outside and low outside, and it is parallel that middle section restrains 15 vertically
In the center line of full film type wall burner hearth 2, the upper section oblique straight pipe beam 14 and full film type wall furnace that are connected with prepattern wall and rear membrane wall
The included angle A of the center line of thorax 2 is 15-20 °, the lower section oblique straight pipe beam 16 being connected with prepattern wall and rear membrane wall and full membrane type
The included angle B of the center line of fireplace thorax 2 is 8-15 °, the upper section oblique straight pipe beam 14 and lower section oblique straight pipe beam being connected with side membrane wall
16 and the included angle A of the center line of full film type wall burner hearth 2 are 15-20 °, and the pipe of 15 Yu full film type wall burner hearth 2 is restrained in middle section vertically
Horizontal distance L between son is 70-110mm.
The prepattern wall middle and lower part that middle section restrains 15 vertically is arranged in feed adapter tube 13, and feed adapter tube 13 inclines in the front is high and the back is low
Tiltedly setting, the angle C of the center line and horizontal plane that are fed adapter tube 13 are 10-30 °, and the front port of feed adapter tube 13 connects direct-push
Batcher, feed adapter tube 13 tube wall rear interior be provided with annular air-cooled cavity 17, be fed adapter tube 13 tube wall top with
Top offers the binder wind ventilation hole 18 and material seeding wind ventilation hole 19 being connected to inside full film type wall burner hearth 2, binder wind respectively
The front is high and the back is low is obliquely installed and the center line (preferably) is parallel to feed and connects for the center line of ventilation hole 18 and material seeding wind ventilation hole 19
The center line of pipe 13,13 front side of feed adapter tube are provided with the external duct collar 20 being connected to inside air-cooled cavity 17.
Secondary air inlet structure 12 enters furnace branch pipe 22 and several including secondary hot-air supervisor 21, several upper layer secondary hot-airs
Lower layer's secondary hot-air enters furnace branch pipe 23, and upper layer secondary hot-air enters the prepattern wall and caudacoria that furnace branch pipe 22 restrains 15 along middle section vertically
Formula wall is contour and is evenly arranged, and lower layer's secondary hot-air enters prepattern wall and rear membrane wall of the furnace branch pipe 23 along fluidized bed combustion chamber 3
Contour and be evenly arranged, upper layer secondary hot-air enters furnace branch pipe 22 and lower layer's secondary hot-air enters furnace branch pipe 23 in high outside and low outside inclination
Setting, upper layer secondary hot-air enters furnace branch pipe 22 and lower layer's secondary hot-air enters the outer end of furnace branch pipe 23 and connects with secondary hot-air supervisor 21
It connects, upper layer secondary hot-air enters furnace branch pipe 22 and what lower layer's secondary hot-air entered furnace branch pipe 23 enters furnace end (inner end) using the outer of variable cross-section
The small conical nozzle structure of imperial palace, the upper layer secondary hot-air that feed adapter tube 13 is located at prepattern wall enters furnace branch pipe 22 and lower layer is secondary
Hot wind enters between furnace branch pipe 23, and the furnace end port that enters that the upper layer secondary hot-air of 13 top of feed adapter tube enters furnace branch pipe 22 connects with feed
The vertical range H1 at 13 inner port center of pipe is 0.8-2.5m, and lower layer's secondary hot-air of 13 lower section of feed adapter tube enters furnace branch pipe 23
The vertical range H2 for entering furnace end port and being fed 13 inner port center of adapter tube be 0.8-2.5m, upper layer secondary hot-air enters furnace branch pipe
22 and lower layer's secondary hot-air enter to be provided with independent expansion joint and volume damper on furnace branch pipe 23；Section bottom secondary hot-air
The outer end for entering furnace branch pipe 23 is provided with material-feeding port, desulfurizing agent entrance and peephole 24 with center line；Section top secondary hot-air
The outer end for entering furnace branch pipe 22 is provided with peephole with center line；
Total actual internal area that lower layer's secondary hot-air enters the conical nozzle structure of furnace branch pipe 23 is greater than upper layer Secondary Air and enters furnace branch pipe
Total actual internal area of 22 conical nozzle structure, lower layer's secondary hot-air enters furnace branch pipe 23 and upper layer Secondary Air enters 22 edge of furnace branch pipe
Furnace chamber width is uniformly and interlaced arrangement, secondary hot-air enter furnace branch pipe 22 and enter the hot air flow of 23 conical nozzle of furnace branch pipe outlet
Speed control is in 50-80m/s.
The rear portion of full film type wall burner hearth 2 is arranged in separation revert system, and separation revert system includes separator 25, separator
25 bottoms are connected to by refeed line 26 with 3 lower rearward side of fluidized bed combustion chamber, and self-balancing returning charge valve 27 is provided on refeed line 26,
The upper front of separator 25 is provided with dipping type chimney intake 28 in tangential direction, and dipping type chimney intake 28 is in front wide and rear narrow
And the flat high shape of dipping type narrow slot that the front is high and the back is low, 28 front end of dipping type chimney intake connect with burner hearth exhanst gas outlet, has a down dip
The top and bottom of 28 rear end of formula chimney intake tilt down certain angle and are parallel to each other, the dipping type chimney intake 28 with
The angle of horizontal plane is 5-10 °.
Burner hearth exhanst gas outlet is the horizontal outer dipping type film being drawn into of the water pipe in the rear membrane wall of full film type wall burner hearth 2
Formula water-cooled flue 7, the vertical cross-section of dipping type film-type water-cooling flue 7 along the longitudinal direction are that bottom edge is that high and bottom edge holding is horizontal
Dipping type ladder structure of right angle, the top margin of ladder structure of right angle and the inclination at 28 top of dipping type chimney intake are consistent, under
The two sides of formula of inclining film-type water-cooling flue 7 be the flat high shape of dipping type pre-large post-small, front wide and rear narrow and that the front is high and the back is low and with have a down dip
The inclination arrangement of formula chimney intake 28 is consistent, the bottom setting of dipping type film-type water-cooling flue 7 and dipping type chimney intake 28
There is accumulatingdust hole, accumulatingdust fluidisation air piping 29 has been arranged in juxtaposition below accumulatingdust hole, has been opened in each accumulatingdust fluidisation air piping 29
Equipped with the stomata sprayed towards accumulatingdust hole.
Superheater 30, high-temperature economizer 31, denitration installation space are disposed in tail vertical well gas flue 4 from top to bottom
32, low-level (stack-gas) economizer 33 and air preheater 34, are respectively provided in the effective range on the every grade of heating surface top of tail vertical well gas flue 4
Equipped with soot blower interface 35.
2 top cross section of full film type wall burner hearth is the rectangular configuration that breadth depth ratio is greater than 1.5, the bottom of fluidized bed combustion chamber 3
It is provided with air distribution plate 36, the prepattern wall and rear membrane wall of fluidized bed combustion chamber 3 are with certain inclination angle from top to bottom to furnace contract
The surface area of air distribution plate 36 is set to account for 0.3-0.45 times of upper furnace rectangular configuration cross-sectional area, air distribution plate 36 is equipped with anti-ash discarding
The small blast cap 37 of cylindricality, so that ignition temperature in full film type wall burner hearth 2 is controlled the temperature range at 720-800 DEG C；Air distribution plate 36
Being provided with has the scum pipe 38 for disclosing slag function, wears an air compartment 9 under scum pipe 38 and extends to outside the lower section of an air compartment 9
Portion.
Upper section oblique straight pipe beam 14, middle section restrain the equal to fiery position of the heating surface pipe of 15 and lower section oblique straight pipe beam 16 vertically
It is welded with intensive pin and coats certain thickness corrosive-proof plastic material progress wear resistant heat preserving protection, on corrosive-proof plastic material surface and burner hearth
The round and smooth no convex transitional of portion's light pipe.
High-temperature economizer 31 uses higher refrigerant flow rate, refrigerant flow rate >=0.8m/s；Air preheater 34 is using resistance to
Corrosion material is made, and the First air for being passed through an air compartment 9 accounts for the 35-45% into 2 total blast volume of full film type wall burner hearth, is passed through feed
The feed wind of adapter tube 13 accounts for the 5-10% into 2 total blast volume of full film type wall burner hearth, and the Secondary Air for being passed through secondary hot-air supervisor 21 accounts for
Into the 45-60% of 2 total blast volume of full film type wall burner hearth.
Full film type wall burner hearth 2, separation revert system and 4 side-by-side parallel of tail vertical well gas flue arrangement and separation revert system position
Between placed in the middle, the structure of front furnace, middle separation and rear vertical shaft is formed, burner hearth uses full film type wall sealing structure, fluidized bed combustion chamber 3
The lower part that is arranged in full film type wall burner hearth 2 is simultaneously protected using moldable, and three-stage evagination allows pipe knot in the longitudinal direction
Structure 11 from top to bottom to contract, in left and right width direction then along three-stage evagination allow pipe structure 11 extend vertically downward naturally with
Air distribution plate 36 cooperatively forms bottom construction, and three-stage evagination allows pipe structure 11 to be located at the top of fluidized bed combustion chamber 3, forms fluidisation
Bed combustor 3 is connect with the transition of the upper rectangular area of full film type wall burner hearth 2, the top cross section in full film type wall burner hearth 2
For the rectangular configuration of wide long deep short (breadth depth ratio is greater than 1.5), 2 top outlet flue of full film type wall burner hearth uses rear membrane wall dipping type
Outer the pulling down of flat high shape and the pre-large post-small membrane type wall outlet variable cross-section to match with the tangential chimney intake 28 of separator 25
Formula of inclining film-type water-cooling flue 7,7 section of dipping type film-type water-cooling flue are that bottom surface is horizontal for high and bottom edge holding along flue gas flow direction
Ladder structure of right angle, the flue gas superficial velocity in upper furnace region is between 3-4.5m/s, it is ensured that material apparently stops in furnace
Time >=4.5s, temperature range (preferably 760 DEG C) of the ignition temperature control at 720-800 DEG C, pendant superheater 6 and burner hearth water
Cold screen 5 is arranged in the upper rectangular area middle and upper part in burner hearth, and its underpart allows the castable of pipe structure 11 far from three-stage evagination
(preferably >=4m) is located under burner hearth three-stage evagination allows in 11 region of pipe structure on the prepattern wall of fluidized bed combustion chamber 3
Portion is equipped with and tilts down certain angle (10-30 °) and the biomass feeding adapter tube 13(communicated with fluidized bed combustion chamber 3 is located at furnace
Near thorax flue gas neutral point), the upper layer secondary hot-air that feed adapter tube 13 is located at prepattern wall enters furnace branch pipe 22 and lower layer's second heat
Wind enters between the conical nozzle of furnace branch pipe 23, and the feed setting of adapter tube 13 has the air-cooled structure of material seeding wind and binder wind, by outer
Interface tube 20 of giving a dinner for a visitor from afar forms separately adjustable feed wind system, simultaneously using direct-push batcher (preferably shaftless double-spiral feeder)
It is connected with feed adapter tube 13, lower layer's secondary hot-air enters furnace branch pipe 23 and upper layer Secondary Air enters furnace branch pipe 22 and is arranged outside three-stage
Hot wind and is precisely filled into corresponding burning oxygen deprivation at the position of sustained height up and down of 11 prepattern wall of pipe structure and rear membrane wall by convex allow
Area, lower layer's secondary hot-air enter furnace branch pipe 23 and the lower part of fluidized bed combustion chamber 3 are arranged in and communicates with fluidized bed combustion chamber 3, upper layer
Secondary hot-air enter furnace branch pipe 22 be arranged in middle section restrain vertically 15 top and communicated with fluidized bed combustion chamber 3, for reduce upper layer
Secondary hot-air enters furnace branch pipe 22 and lower layer's secondary hot-air enters 23 resistance of furnace branch pipe and uses the outer imperial palace of variable cross-section in burner hearth inlet
Small conical nozzle structure, total actual internal area that lower layer's secondary hot-air enters 23 conical nozzle of furnace branch pipe are greater than upper layer Secondary Air and enter
Total actual internal area of 22 conical nozzle of furnace branch pipe, and be evenly arranged and mutually stagger in the width direction, and make secondary hot-air branch
Pipe conical nozzle exports hot wind flow control in 50-80m/s, and upper layer secondary hot-air enters furnace branch pipe 22 and lower layer's secondary hot-air enters
Away from feed 13 vertical interval of adapter tube in 0.8-2.5m, upper layer secondary hot-air enters furnace branch pipe 22 for the conical nozzle position of furnace branch pipe 23
Enter furnace branch pipe 23 with lower layer secondary hot-air and all have independent tune wind structure (volume damper) to realize single branch pipe air quantity
Independent precisely to adjust, the bottom of fluidized bed combustion chamber 3 is arranged in air distribution plate 36, and 36 surface area of air distribution plate accounts for full film type wall burner hearth 2
0.3-0.45 times of Upper rectangular cross section, the small blast cap 37(blast cap aperture flow velocity of cylindricality that air distribution plate 36 is equipped with anti-ash discarding exist
25-35m/s is taken under standard state), fluidization quality is also ensured that while reducing by 36 resistance of air distribution plate, one time air compartment 9 is arranged in cloth wind
The lower section of plate 36 is simultaneously connected with First air, have disclose slag function scum pipe 38 be arranged on air distribution plate 36 and under wear an air compartment
9 and the outside of air compartment is extended to, the setting of igniter 10 realizes automatic ignition, the top of separator 25 at 9 rear portion of air compartment
It is communicated with the outlet of the outer drawing dipping type film-type water-cooling flue 7 of upper furnace, the lower part of separator 25 and the top phase of refeed line 26
Even, the lower part of refeed line 26 communicates and is located at the lower part that lower layer's secondary hot-air enters furnace branch pipe 23, self-balancing with fluidized bed combustion chamber 3
Returning charge valve 27 is mounted on refeed line 26, the entrance and 8 phase of offset central tube on 25 top of separator of tail vertical well gas flue 4
Logical, superheater 30, economizer and air preheater 34 are all disposed in vertical well gas flue, in the every grade of heating surface of tail vertical well gas flue 4
It is respectively provided in the effective range on top equipped with soot blower interface 35.
Top cross section in full film type wall burner hearth 2 is the rectangular configuration that breadth depth ratio is greater than 1.5, high using biggish burner hearth
Degree and burner hearth cross-sectional area, setting three-stage evagination allow pipe structure 11 to realize 2 top of full film type wall burner hearth and fluidized bed combustion
Furnace water cooling screen 5 and pendant superheater 6, fluidized bed combustion are arranged in the anti-wear rounding off of room 3,2 middle and upper part of full film type wall burner hearth
The front and back membrane wall for burning room 3 makes 36 surface area of air distribution plate account for upper furnace rectangular cross section with certain inclination angle to furnace contract
0.3-0.45 times (capping, more carefully removes the limit when biological particles are larger), the cylindricality that air distribution plate 36 is equipped with anti-ash discarding is small
The aperture flow velocity of blast cap 37, the small blast cap 37 of cylindricality takes 25-35m/s under standard state, the ignition temperature control in full film type wall burner hearth 2
At 720-800 DEG C of temperature range (preferably 760 DEG C).
Then divide between the wall surface of raised type trapezoid space and full film type wall burner hearth 2 that three-stage evagination allows pipe structure 11 to be formed
It is not bent to realize that rounding off connects, is had a style of one's own with full film type wall burner hearth 2, to form full film type wall burner hearth by pipe
The upper section oblique straight pipe beam 14 of 2 four peripheral wall surfaces, middle section restrain 15 and lower section oblique straight pipe beam 16 vertically, allow pipe by the three-stage evagination
Structure 11 makes the rounding off of the formation of full film type wall burner hearth 2 lower part larger evagination rectangular section and upper furnace rectangular section.On
What section oblique straight pipe beam 14, middle section restrained the heating surface pipe of 15 and lower section oblique straight pipe beam 16 vertically is welded with intensive pin to fiery position
It follows closely and coats certain thickness corrosive-proof plastic material and carry out wear resistant heat preserving protection, and anti-wear plastic is made by certain inclination angle at the top of it
Material and the round and smooth no convex transitional of 2 top light pipe of full film type wall burner hearth.Pipe structure 11 is allowed by the way that three-stage evagination is arranged, and connects feed
The conical nozzle that pipe 13 and upper layer secondary hot-air enter furnace branch pipe 22 can be arranged in the middle section restrain vertically 15 prepattern wall and
Afterwards in membrane type wall region, and make the region corrosive-proof plastic material and furnace combustion zone corrosive-proof plastic material without raised natural transition shape
Integrally, while also make to allow between 2 top light pipe membrane wall of furnace combustion zone and full film type wall burner hearth by the three-stage evagination
Pipe structure 11 forms nature and connects without protrusion, and playing prevents from making due to the convex change in 2 section of full film type wall burner hearth and dust-contained airflow turn to
The vortex of Cheng Naicai and upper furnace light pipe membrane wall juncture area is worn, and upper layer secondary hot-air is also made to enter the taper of furnace branch pipe 22
Spout is far from the interface, to prevent causing the mill to upper furnace light pipe membrane wall because of the disturbance of the addition of feed and Secondary Air
Damage, while the horizontal distance of the trapezoid space for allowing pipe structure 11 to be constituted three-stage evagination and upper furnace rectangular section controls
It is preferred in 70-110mm(), more conducively mitigate abrasion and maintains relatively-high temperature.Pipe structure 11 is allowed using the three-stage evagination, makes to come
From the ash-laden gas of 2 lower cone section variable cross-section of full film type wall burner hearth, (three-stage evagination allows pipe knot for larger rectangular-section void herein
Structure 11) in further mix to flow through and cross, and make part flue dust and feed separation, to mitigate the abrasion to furnace heating surface,
So that feed 13 region of adapter tube is formed widened relatively-high temperature area space because resistance to material covers simultaneously, makes to enter full film type wall burner hearth
2 fuel can dry rapidly and ignition, the adaptability of overheavy firing effect and fuel, is conducive to after-flame, improves fuel
Utilization rate.
Secondary air inlet structure 12 is arranged on 2 front and back membrane wall of full film type wall burner hearth and uses layered arrangement and passes through independence
Volume damper realize respectively it is separately adjustable, also have expansion joint.Upper layer secondary hot-air enters furnace branch pipe 22 and lower layer's second heat
Wind, which enters furnace branch pipe 23 three-stage evagination is arranged in, allows the prepattern wall of pipe structure 11 and the sustained height up and down of rear membrane type wall region
Hot wind is simultaneously precisely filled into corresponding burning oxygen-depleted zone by position, and lower layer's secondary hot-air enters furnace branch pipe 23 and is arranged in fluidized bed combustion chamber 3
Lower part and communicated with fluidized bed combustion chamber 3, upper layer secondary hot-air enters furnace branch pipe 22 and lower layer's secondary hot-air enters furnace branch pipe 23
Strengthen injection in the conical nozzle structure that 2 inlet of full film type wall burner hearth uses the outer imperial palace of variable cross-section small to reduce branch resistance
Effect, total actual internal area that lower layer's secondary hot-air enters furnace branch pipe conical nozzle are greater than upper layer Secondary Air and enter furnace branch pipe conical nozzle
Total actual internal area, and be evenly arranged and mutually stagger along section of burner hearth width direction, and upper layer secondary hot-air is made to enter furnace branch
Pipe 22 and lower layer's secondary hot-air enter the conical nozzle outlet hot wind flow control of furnace branch pipe 23 in 50-80m/s, are fed adapter tube 13
The upper layer secondary hot-air of top enters vertical range H1 of the inner port of furnace branch pipe 22 apart from feed 13 inner port center of adapter tube
0.8-2.5m, lower layer's secondary hot-air of 13 lower section of feed adapter tube enter inner port distance feed 13 inner port of adapter tube of furnace branch pipe 23
The vertical range H2 at center is 0.8-2.5m, and hot wind is precisely filled into corresponding burning oxygen-depleted zone.Hot wind is precisely filled into burning
Oxygen-depleted zone had not only precisely filled into oxygen and has met efficient burning demand, but can disturbance mixed effect of the enhanced fuel in burner hearth, make to fire
Material and chamber flue gas temperature are more evenly distributed in full film type wall burner hearth 2, prevent local burnup's accumulation and localized hyperthermia's combustion
It burns, local coking and furnace heating surface is caused to hang burnt and weaken desulfurization off sulfide effect, and effectively extend material and stop in burner hearth
Stay burning time, strengthen pollutant from removal performance, improve the burn-off rate of fuel, also further decrease furnace bottom siege top
Ignition temperature and fuel quantity prevent siege coking.Upper layer Secondary Air fills into, and on the one hand the power field energy of its downward spout makes portion
Divide fuel to again return to 2 lower combustion of full film type wall burner hearth, also further extends the relatively fine particle in fuel in burner hearth
Residence time breaks volatile matter moment is precipitated largely since the addition of fuel is heated simultaneously also by filling into for upper Secondary Air
And fuel vigorous combustion is caused to be formed by local oxygen-depleted zone, so that Secondary Air is precisely filled into the oxygen deprivation in burner hearth fuel inlet region
Area, and supplemental oxygen is strengthened disturbance and is mixed and burned, and is also conducive to inhibit SO2With being initially generated for NOx, strengthen desulfuration in furnace and autospasy
Sulphur effect can also strengthen generated NOx and soot particle effect and part NOx is made to be reduced to N2, i.e., from denitration effect in reinforcing furnace,
So that boiler is had both pollutant from removal performance, reduces SO from source2With the initial ejection concentration of NOx pollutant, pollutant is realized
Emission reduction in furnace.Moreover, upper Secondary Air fill into and the setting of overfire air port percentage of air passage up and down, also provide enhanced full film type wall
The air feed of 2 top and the bottom of burner hearth redistributes the combustion share on 2 top of full film type wall burner hearth again, further improves complete
The combustion share on 2 top of membrane wall burner hearth makes material burning full of entire 2 space of full film type wall burner hearth, is conducive to improve full film
The ignition temperature on 2 top of formula fireplace thorax is horizontal, conducive to the low-temperature burning performance for burning and keeping burner hearth of fuel, and prevents full film
2 top of formula fireplace thorax occurs situations such as dust stratification and slagging and causes alkali metal corrosion and damage, and SO is effectively reduced2It is initial with NOx
Production quantity improves boiler efficiency and pollutant minimum discharge environment protecting.And lower layer's Secondary Air enters furnace branch pipe and is located at material inlet
Lower section further uniformly sends out fuel to prevent local accumulation, had both supplemented air and has strengthened disturbance mixing, and had reduced on air distribution plate
Fuel quantity, more conducively fuel combustion.Upper layer Secondary Air enters furnace branch pipe 22 and lower layer's secondary hot-air enters and has on furnace branch pipe 23
Expansion joint, to meet the expanding needs between full film type wall burner hearth 2 and Secondary Air.Meanwhile also respectively in section bottom second heat
Wind enters to be provided with material-feeding port and desulfurizing agent entrance and peephole 24 in furnace branch pipe, also enters furnace branch pipe in section top secondary hot-air
It is provided with peephole, inside to meet the needs of supplementing further desulfurization in bed material and furnace and monitoring combustion conditions in furnace.
It is fed the air-cooled structure that setting in adapter tube 13 has material seeding wind and binder wind, enters furnace positioned at upper and lower layer secondary hot-air
Between the spout of branch pipe, the three-stage evagination that feed adapter tube 13 tilts down certain angle and prepattern wall allows 11 region of pipe structure
Material inlet be connected, and be arranged near 2 flue gas neutral point of full film type wall burner hearth.Feed 13 one end of adapter tube pushes away feed-type with straight
Batcher be connected, be fed inside adapter tube 13 and pour certain thickness resistance to material progress exclusion seal.In the top and the bottom of the material inlet
Position has been respectively arranged the binder wind ventilation hole 18 and material seeding wind ventilation hole 19(preferred aperture ￠ 18- ￠ 32 of multiple smaller aperture dues, excellent
Select wind speed 25-45m/s) and tilt down certain angle and enter full film type wall burner hearth 2, the binder wind ventilation hole 18 of the smaller aperture due
Pass through and castable and be connected to full film type wall burner hearth 2 with 19 one end of material seeding wind ventilation hole, the other end then be fed 13 tube wall of adapter tube
Internal air-cooled cavity 17 communicates, and is respectively formed the binder wind on top and the material seeding wind of lower part.It is connected in the air-cooled cavity 17
External duct collar 20 to form air-cooled structure, and forms separately adjustable feed wind system.Material seeding wind makes fuel enter furnace
It is first scattered in after thorax on the material seeding wind and continues to push toward 2 depth direction of full film type wall burner hearth, fuel is uniformly sent out to prevent
Local accumulation had both supplemented air and has strengthened mixing, burnt rapidly conducive to fuel, also effectively prevent being fed adherent inflow burner hearth and to
Nearby burn material mouth to form extension burnt and influence operational safety by localized hyperthermia, at the same can also mitigate material inlet lower part flue gas positive pressure to
The influence of material makes to be fed more blocking-resistant safety；The binder wind of material inlet then effectively prevent the fine grained in furnace fuel directly up
Material whereabouts trend is strengthened in drift, extends particle residence time, conducive to burning.Simultaneously the air-cooled cavity 17 also to batcher and
Feed adapter tube 13 plays cooling effect, and playing prevents fuel premature combustion, plays a protective role to batcher.It is equal to be fed adapter tube 13
Tilt down certain angle, more conducively fuel enters furnace and prolonging burning time.Preferably, adapter tube 13, the ventilation of binder wind are fed
Hole 18 and material seeding wind ventilation hole 19 tilt down 10-30 ° the front is high and the back is low be obliquely installed it is dry to the obstruction of feed to reduce flue gas
It disturbs, and the air feed for being fed wind system comes from a hot wind, local preheating, the combustion of more adapted biomass can be carried out to the fuel for entering stokehold
The material fuel characteristic that moisture content is big and difference is big.
Because biomass bulk cargo fuel ash is seldom, specific gravity is much smaller than shaped fuel and coal grain, and biomass bulk cargo is in burner hearth
Based on fluidization-suspension combustion, then it is equipped with the arrangement of lower layer's Secondary Air, only part bulky grain and the impurity of entrainment falls into lower part
Siege, therefore the hearth area that fluidized bed combustion needs wants small relative to coal stove.Therefore 36 surface area of air distribution plate accounts for upper furnace square
0.3-0.45 times (capping, more carefully removes the limit when biological particles are larger) of shape cross section, air distribution plate 36 are equipped with more
The small blast cap 37(blast cap aperture flow velocity of the cylindricality of the anti-ash discarding of quantity takes 25-35m/s under standard state, takes when biological particles are larger
The upper limit more carefully removes the limit), to reduce 36 resistance of air distribution plate, fluid effect is improved, reduces energy consumption, that improves fuel burns effect
Fruit realizes sunken bed pressure operation.
It is respectively provided with soot blower interface 35 in the effective range on every grade of heating surface top in tail vertical well gas flue 4, and is wanted
Ask selective sootblowing, effective deashing.Specific position matches with soot-blowing mode, to ensure soot blowing effect.
Biggish furnace height and burner hearth cross-sectional area and heating surface area are selected, the cigarette of the upper rectangular area in burner hearth is made
Gas superficial velocity is adapted to grey shell caused by burning rapidly is largely precipitated because of fugitive constituent in biomass fuel and wraps up between 3-4.5m/s
Coke granule be not easy the characteristic burnt, it is ensured that material apparent residence time >=4.5s in furnace, extend particle in burner hearth
Burning time is conducive to fuel after-flame.Upper furnace outlet flue using the flat high shape of rear membrane wall dipping type and with separator 25 into
The outer drawing dipping type film-type water-cooling flue for the pre-large post-small membrane type wall outlet variable cross-section that mouth matches, section is along flue gas flow direction
It is the ladder structure of right angle that bottom surface is height and bottom edge holding level, further to cool down flue dust, accelerates material concentration, improve and separate
25 working condition of device improves separative efficiency.Pendant superheater 6 and furnace water cooling screen 5 are arranged in burner hearth internal upper part rectangular area
Middle and upper part, its underpart allows the castable (preferably >=4m) of pipe structure far from burner hearth three-stage evagination, while strengthening upper furnace biography
Heat, with adapt to burning high-volatile biomass fuel when easily cause upper furnace temperature drift problem, be conducive to maintain burner hearth on
The low-temperature burning in portion reduces SO2SO is initially generated and strengthened with NOx2And NOx autospasy removing solid capacity, mitigate the mill of curtain wall
Damage, and effectively prevent heating surface coking dust stratification and alkali metal corrosion occurs.It is located at three on the prepattern wall of fluidized bed combustion chamber 3
Segmentation evagination allows the middle and lower part in 11 region of pipe structure (to be located at equipped with the biomass fuel material inlet communicated with fluidized bed combustion chamber 3
Near burner hearth flue gas neutral point), in favor of the addition of fuel.By the arrangement and combustion adjustment of full film type wall burner hearth 2, make burner hearth
Ignition temperature controls in 720-800 DEG C of temperature range (preferably 760 DEG C), to prevent 2 coking of full film type wall burner hearth product
Ash mitigates the alkali metal corrosion of burner hearth, reduces ash fusion point reduction, bed material coking and alkali metal that biomass burning bulk cargo is caused
The adverse effect such as corrosion, it is ensured that safe and stable operation.
Preferably, to adapt to tightened up environmental requirement, boiler 250-400 DEG C of flue gas temperature in tail vertical well gas flue 4
Spend installation site space (the denitration installation space of SCR denitration or other NO_x Reduction by Effective modes at reserved space one
32), with the demand of the diversity of adapted biomass fuel and more high-environmental discharge standard.The specific setting of denitration installation space 32
Position matches with denitration mode.
Preferably, separator 25 is thermal insulation cyclone separator 25, and upper part uses offset central tube 8, and uses
The dipping type of dust deposit in flue and the tangential chimney intake 28 of the flat high shape of narrow slot with fluidized wind are concentrated and prevented convenient for material,
Aperture blast cap of the fluidized wind of accumulatingdust by multiple air hoses and thereon realizes that the fluidisation of fallout takes away removing by flue gas.
The outer membrane formula water-cooled flue of the tangential chimney intake and membrane wall dipping type variable cross-section after burner hearth is postponed by expansion joint realization
It is smooth to be connected.Using the thermal insulation cyclonic separation of the flat high tangential chimney intake of shape of central tube offset and dipping type narrow slot
Device 25, realization efficiently separates, conducive to fuel low-temperature burning and burn, improve efficiency of combustion, reduce being initially generated for pollutant
And strengthen the pollutant autospasy removing solid capacity of recycle stock, the more conducively minimum discharge of pollutant reduces energy consumption, can also effectively reduce
Bed material increment maintains normal bed pressure and 2 heat transfer requirement of Matter Transfer and full film type wall burner hearth.
Preferential, to the superheat steam temperature (≤450 DEG C) of low parameter, pendant superheater 6 can be used as medium temperature overheater, high
Warm superheater and low temperature superheater may be arranged in tail vertical well gas flue 4, and 6 front and back of pendant superheater then passes through hybrid desuperheat system
System is connected with the superheater 30 of tail vertical well gas flue 4 respectively.To boiler (the superheat steam temperature > 450 of other high parameters
DEG C), pendant superheater 6 will be used as high temperature superheater, and low temperature superheater and medium temperature overheat are only arranged in tail vertical well gas flue 4
Device, while hybrid subtract is arranged between the superheater of tail vertical well gas flue 4 30 or between medium temperature overheater and pendant superheater 6
Warm system can also export in pendant superheater 6 and arrange that the hybrid temperature reducing system of level-one carries out terminal desuperheat to ensure that steam is joined again
Number better meets use demand.Hybrid temperature reducing system has desuperheat amplitude big, adjusts sensitive advantage, can preferably fit
It answers more than biomass fuel type and moisture, calorific value changes the demand of fuel characteristic and wide load operation greatly.
Preferably, furnace water cooling screen 5 and pendant superheater 6, are membrane panel structure, are evenly arranged in full film type wall
In burner hearth 2 and parallel with the side membrane wall of full film type wall burner hearth 2, furnace water cooling screen 5 and pendant superheater 6 are hung in full film vertically
In formula fireplace thorax 2, the upper end is directly pierced by 2 top of full film type wall burner hearth and by hanger hanging on furnace roof steelframe upwards, under
End is by bending steering and the certain angle that has a down dip to outside furnace is pierced by full film type wall burner hearth 2, and the upper and lower side of furnace water cooling screen 5 is and entirely
2 welded seal of membrane wall burner hearth.The lower end of pendant superheater 6 and 2 welded seal of full film type wall burner hearth, pendant superheater 6 it is upper
End then passes freely through at the top of the membrane wall of full film type wall burner hearth 2 and is hung on furnace roof steelframe by constant force spring hanging frame, shields formula
The upper end of superheater 6 is by welded seal at the top of the membrane wall of type metal expansion joint and full film type wall burner hearth 2, to meet screen formula overheat
The upward free wxpansion demand of device 6 prevents pendant superheater 6 from deforming, it is ensured that safety.The bottom of furnace water cooling screen 5 and pendant superheater 6
Portion bending steering position region is welded with intensive pin and coats certain thickness corrosive-proof plastic material and protected, and to it is wear-resisting can
The vertical tube panel surrounding of (preferably 300-800mm) carries out wear resistant alloy powders spraying within the scope of the above certain altitude in plastics top edge
To prevent from wearing.There are 600-800mm between depth direction and full film type wall burner hearth 2 for furnace water cooling screen 5 and pendant superheater 6
Space for maintenance, and the posterior edges of furnace water cooling screen 5 and pendant superheater 6 are no more than the vertical center line of full film type wall burner hearth 2,
In order to avoid influencing the uniformity of fire box temperature and flow of flue gas due to the arrangement of furnace water cooling screen 5 and pendant superheater 6, and mitigate
Thermal deviation in furnace water cooling screen 5 and the abrasion of pendant superheater 6 and furnace water cooling screen 5 and pendant superheater 6 between each tube panel,
Conducive to the safety for improving heat transfer efficiency and furnace water cooling screen 5 and pendant superheater 6.
Preferential, tail portion superheater 30, economizer and 34 heating surface of air preheater are all made of wide pitch, in-line, low stream
Speed arrangement (preferably flue gas flow rate≤8.5m/s) to effectively prevent dust stratification between pipe to put up a bridge, and uses big margin design to heating surface,
To weaken because fouling of heating surface causes heat utilization efficiency to reduce the influence to boiler parameter, it is more convenient for deashing also to improve heating surface benefit
With rate.
Preferably, high-temperature economizer 31 is arranged using single-stage, and keeps higher refrigerant flow rate (preferential >=0.8m/s), is come
The diversity and otherness of adapted biomass fuel, and the part for causing high-temperature economizer 31 because of fuel difference is effectively prevent to vaporize
And influence boiler water cycle safety.
Preferably, air preheater 34 uses horizontal pipe structure, and preferred resistant material, as centering high temperature section uses
Steel is stepped in examining for acid corrosion-resistant, uses enamel pipe to low-temperature zone, to slow down corrosion and improve usage factor and service life.
Preferably, the First air for being passed through an air compartment accounts for the 35-45% into full film type wall burner hearth total blast volume, is passed through feed
The feed wind of adapter tube accounts for the 5-10% into full film type wall burner hearth total blast volume, and the Secondary Air for being passed through secondary hot-air supervisor accounts for entrance
The 45-60% of full film type wall burner hearth total blast volume.And it is adjusted according to specific fuel and load condition.
Preferably, the front and back membrane wall of fluidized bed combustion chamber 3 forms the inclination angle of bottom construction to furnace contract as B.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (10)
1. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge, including drum, full film type wall burner hearth, fluidized bed combustion chamber,
Separation revert system and tail vertical well gas flue, full film type wall burner hearth internal upper part are provided with furnace water cooling screen and pendant superheater, pot
The top of full film type wall burner hearth is arranged in cylinder, and the rear side of the lower part and fluidized bed combustion chamber that separate revert system connects, and separation is returned
The top of material system is connect by burner hearth exhanst gas outlet with the upper back of full film type wall burner hearth, and the top of tail vertical well gas flue is logical
It crosses offset central tube and is connected with the top for separating revert system, fluidized bed combustion chamber bottom is provided with an air compartment, First air
Igniter is provided on rear side of room, it is characterised in that: full film type wall lower furnace portion by be membrane wall three-stage evagination
Pipe structure and fluidized bed combustion chamber top is allowed to connect, three-stage evagination allows the prepattern wall of pipe structure and rear membrane wall to be provided with two
Secondary air inlet structure, three-stage evagination allow the prepattern wall of pipe structure be provided with the air-cooled structure with material seeding wind and binder wind to
Material adapter tube.
2. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge according to claim 1, it is characterised in that: three-stage
Evagination allows pipe structure to make full film type wall lower furnace portion convex to external bending by the pipe of full film type wall lower furnace portion surrounding
Upper section oblique straight pipe beam, middle section is formed out to restrain vertically and lower section oblique straight pipe beam, upper section oblique straight pipe beam is obliquely installed in low inside and high outside,
Lower section oblique straight pipe beam is obliquely installed in high outside and low outside, and the center line for being parallel to full film type wall burner hearth is restrained in middle section vertically, with cephacoria
The included angle A of the center line of the connected upper section oblique straight pipe beam of formula wall and rear membrane wall and full film type wall burner hearth is 15-20 °, and preceding
The included angle B of the center line of lower section oblique straight pipe beam and full film type wall burner hearth that membrane wall and rear membrane wall are connected is 8-15 °, with
The included angle A of the center line of the connected upper section oblique straight pipe beam of side membrane wall and lower section oblique straight pipe beam and full film type wall burner hearth is 15-
20 °, it is 70-110mm that the horizontal distance L between the pipe of full film type wall burner hearth is restrained in middle section vertically.
3. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge according to claim 2, it is characterised in that: feed connects
The prepattern wall middle and lower part restrained vertically in middle section is arranged in pipe, and feed adapter tube is obliquely installed in the front is high and the back is low, is fed in adapter tube
The angle C of heart line and horizontal plane is 10-30 °, the front port connection direct-push batcher of adapter tube is fed, after being fed the tube wall of adapter tube
Side be internally provided with annular air-cooled cavity, be fed adapter tube tube wall upper and lower part offer respectively in full film type wall burner hearth
After the preceding height of the center line of the binder wind ventilation hole and material seeding wind ventilation hole of portion's connection, binder wind ventilation hole and material seeding wind ventilation hole
Low dip setting, feed adapter tube front side are provided with the external duct collar being connected to air-cooled cavity inside.
4. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge according to claim 1, it is characterised in that: it is secondary into
Wind structure includes secondary hot-air supervisor, several upper layer secondary hot-airs enter furnace branch pipe and several lower layer's secondary hot-airs enter furnace branch
Pipe, upper layer secondary hot-air enters the prepattern wall that furnace branch pipe is restrained vertically along middle section and rear membrane wall is contour and be evenly arranged, lower layer
It is contour along the prepattern wall of fluidized bed combustion chamber and rear membrane wall and be evenly arranged, upper layer secondary hot-air that secondary hot-air enters furnace branch pipe
Enter furnace branch pipe and lower layer's secondary hot-air enter furnace branch pipe and be in it is high outside and low outside be obliquely installed, upper layer secondary hot-air enters furnace branch pipe and lower layer
The outer end that secondary hot-air enters furnace branch pipe, which is responsible for secondary hot-air, to be connected, and upper layer secondary hot-air enters furnace branch pipe and lower layer's secondary hot-air
Enter furnace branch pipe enters the furnace end conical nozzle structure small using the outer imperial palace of variable cross-section, and feed adapter tube is located at the upper layer of prepattern wall
Secondary hot-air enters furnace branch pipe and lower layer's secondary hot-air enters between furnace branch pipe, and the upper layer secondary hot-air of feed adapter tube top enters furnace branch pipe
Enter furnace port and feed take over into furnace port center vertical range H1 be 0.8-2.5m, feed adapter tube lower section lower layer two
The vertical range H2 for entering furnace port and being fed adapter tube inner port center that secondary hot wind enters furnace branch pipe is 0.8-2.5m, upper layer second heat
Wind enters furnace branch pipe and lower layer's secondary hot-air enters to be provided with independent expansion joint and volume damper on furnace branch pipe；Section bottom two
The outer end that secondary hot wind enters furnace branch pipe is provided with material-feeding port, desulfurizing agent entrance and peephole with center line；Section top second heat
The outer end that wind enters furnace branch pipe is provided with peephole with center line；
Total actual internal area that lower layer's secondary hot-air enters the conical nozzle structure of furnace branch pipe is greater than upper layer Secondary Air and enters furnace branch pipe
Total actual internal area of conical nozzle structure, lower layer's secondary hot-air enters furnace branch pipe and upper layer Secondary Air enters furnace branch pipe along furnace width
Direction is uniformly and interlaced arrangement, secondary hot-air enter the hot wind flow control of the conical nozzle outlet of furnace branch pipe in 50-80m/s.
5. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge according to claim 1, it is characterised in that: separation is returned
Material system is arranged in the rear portion of full film type wall burner hearth, and separation revert system includes separator, separator bottom by refeed line with
Fluidized bed combustion chamber lower rearward side is connected to, and self-balancing returning charge valve is provided on refeed line, and the upper front of separator is tangentially square
To dipping type chimney intake is provided with, dipping type chimney intake is in the flat high shape of dipping type narrow slot front wide and rear narrow and that the front is high and the back is low
Shape, dipping type chimney intake front end are connect with burner hearth exhanst gas outlet, and the top and bottom of dipping type chimney intake rear end are downward
It is tilted a certain angle and is parallel to each other, the angle of the dipping type chimney intake and horizontal plane is 5-10 °.
6. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge according to claim 5, it is characterised in that: burner hearth cigarette
Gas outlet is the horizontal outer dipping type film-type water-cooling flue being drawn into of the water pipe in the rear membrane wall of full film type wall burner hearth, is had a down dip
The vertical cross-section of formula film-type water-cooling flue along the longitudinal direction is that bottom edge is high and bottom edge holding level dipping type right-angled trapezium knot
Structure, top margin and the inclination at the top of dipping type chimney intake of ladder structure of right angle are consistent, dipping type film-type water-cooling flue
Two sides are the flat high shape of dipping type pre-large post-small, front wide and rear narrow and that the front is high and the back is low and are in tilted layout with dipping type chimney intake
It is consistent, the bottom of dipping type film-type water-cooling flue and dipping type chimney intake is provided with accumulatingdust hole, accumulatingdust hole lower section
It has been arranged in juxtaposition accumulatingdust fluidisation air piping, has offered the stomata sprayed towards accumulatingdust hole in each accumulatingdust fluidisation air piping.
7. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge according to claim 1, it is characterised in that: tail portion is perpendicular
Superheater, high-temperature economizer, denitration installation space, low-level (stack-gas) economizer and air preheat are disposed in well flue from top to bottom
Device is respectively provided with equipped with soot blower interface in the effective range on every grade of heating surface top of tail vertical well gas flue.
8. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge according to claim 1, it is characterised in that: full membrane type
Fireplace thorax top cross section is the rectangular configuration that breadth depth ratio is greater than 1.5, and the bottom of fluidized bed combustion chamber is provided with air distribution plate, is fluidized
The prepattern wall and rear membrane wall of bed combustor make the surface area of air distribution plate account for furnace to furnace contract from top to bottom with certain inclination angle
0.3-0.45 times of thorax Upper rectangular feature cross-section product, air distribution plate is equipped with the small blast cap of cylindricality of anti-ash discarding, makes full film type wall
Temperature range of the ignition temperature control at 720-800 DEG C in burner hearth；Air distribution plate is provided with the scum pipe for disclosing slag function, row
An air compartment is worn under slag pipe and extends to the lower outer of an air compartment.
9. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge according to claim 2, it is characterised in that: upper section is oblique
Straight tube beam, middle section restrain vertically and the heating surface pipe of lower section oblique straight pipe beam to fiery position be welded with intensive pin and coat one
The corrosive-proof plastic material for determining thickness carries out wear resistant heat preserving protection, and corrosive-proof plastic material surface and upper furnace light pipe are round and smooth without raised mistake
It crosses.
10. the energy-saving biomass recirculating fluidized bed boiler of minimum discharge according to claim 7, it is characterised in that: high temperature
Economizer uses higher refrigerant flow rate, refrigerant flow rate >=0.8m/s；Air preheater is made of resistant material；It is passed through
The First air of air compartment accounts for the 35-45% into full film type wall burner hearth total blast volume, and the feed wind for being passed through feed adapter tube is accounted for into complete
The 5-10% of membrane wall burner hearth total blast volume, the Secondary Air for being passed through secondary hot-air supervisor are accounted for into full film type wall burner hearth total blast volume
45-60%。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910651405.4A CN110260301B (en) | 2019-07-18 | 2019-07-18 | Ultralow-emission energy-saving biomass circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910651405.4A CN110260301B (en) | 2019-07-18 | 2019-07-18 | Ultralow-emission energy-saving biomass circulating fluidized bed boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110260301A true CN110260301A (en) | 2019-09-20 |
| CN110260301B CN110260301B (en) | 2024-03-08 |
Family
ID=67927087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910651405.4A Active CN110260301B (en) | 2019-07-18 | 2019-07-18 | Ultralow-emission energy-saving biomass circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110260301B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793013A (en) * | 2019-12-16 | 2020-02-14 | 哈尔滨红光锅炉总厂有限责任公司 | High-temperature and high-pressure steam boiler of pure-burning biomass environment-friendly circulating fluidized bed |
| CN111561695A (en) * | 2020-05-20 | 2020-08-21 | 沈阳东管电力科技集团股份有限公司 | Boiler flue gas and air system |
| CN111664445A (en) * | 2020-07-10 | 2020-09-15 | 青岛特利尔环保集团股份有限公司 | Semi-coke powder circulating fluidized bed boiler based on material heat balance |
| CN111795379A (en) * | 2020-08-07 | 2020-10-20 | 无锡华光环保能源集团股份有限公司 | Circulating fluidized bed boiler for burning biomass |
| CN114484490A (en) * | 2022-01-17 | 2022-05-13 | 柏乡县热华能源科技有限公司 | Self-cooling direct-pushing feeding device suitable for biomass |
| CN116182153A (en) * | 2022-12-29 | 2023-05-30 | 哈尔滨红光锅炉总厂有限责任公司 | Downward side cutting type hearth outlet smoke window structure of energy-saving circulating fluidized bed boiler |
| CN116972382A (en) * | 2023-09-22 | 2023-10-31 | 河南华泰石化装备股份有限公司 | Ultralow-emission energy-saving environment-friendly biomass boiler and combustion method |
| CN117588755A (en) * | 2023-12-27 | 2024-02-23 | 中科合肥煤气化技术有限公司 | Circulating fluidized bed incinerator system and method for recycling low-heating value gasified fly ash |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201582805U (en) * | 2010-01-05 | 2010-09-15 | 太原锅炉集团有限公司 | Biomass-energy circulating fluidized bed boiler with low energy consumption |
| CN202303349U (en) * | 2011-08-11 | 2012-07-04 | 江苏四方锅炉有限公司 | Membrane wall type four-flue biomass circulating fluidized bed boiler |
| US20160146452A1 (en) * | 2014-02-19 | 2016-05-26 | Sen Wang | Fluidized-bed boiler integrating multifunctional inertia-gravity separator with multiple furnace profiles |
| CN105627301A (en) * | 2016-03-16 | 2016-06-01 | 太原锅炉集团有限公司 | Circulating fluidized bed boiler for purely burning furfural residues |
| CN205909261U (en) * | 2016-06-27 | 2017-01-25 | 太原锅炉集团有限公司 | Biomass circulating fluid bed boiler based on flow state reconsitution |
| KR20180079724A (en) * | 2017-01-02 | 2018-07-11 | 현대건설주식회사 | Circulating fluidized bed boiler system |
| CN210462983U (en) * | 2019-07-18 | 2020-05-05 | 曹德鸣 | Ultralow-emission energy-saving biomass circulating fluidized bed boiler |
-
2019
- 2019-07-18 CN CN201910651405.4A patent/CN110260301B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201582805U (en) * | 2010-01-05 | 2010-09-15 | 太原锅炉集团有限公司 | Biomass-energy circulating fluidized bed boiler with low energy consumption |
| CN202303349U (en) * | 2011-08-11 | 2012-07-04 | 江苏四方锅炉有限公司 | Membrane wall type four-flue biomass circulating fluidized bed boiler |
| US20160146452A1 (en) * | 2014-02-19 | 2016-05-26 | Sen Wang | Fluidized-bed boiler integrating multifunctional inertia-gravity separator with multiple furnace profiles |
| CN105627301A (en) * | 2016-03-16 | 2016-06-01 | 太原锅炉集团有限公司 | Circulating fluidized bed boiler for purely burning furfural residues |
| CN205909261U (en) * | 2016-06-27 | 2017-01-25 | 太原锅炉集团有限公司 | Biomass circulating fluid bed boiler based on flow state reconsitution |
| KR20180079724A (en) * | 2017-01-02 | 2018-07-11 | 현대건설주식회사 | Circulating fluidized bed boiler system |
| CN210462983U (en) * | 2019-07-18 | 2020-05-05 | 曹德鸣 | Ultralow-emission energy-saving biomass circulating fluidized bed boiler |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793013A (en) * | 2019-12-16 | 2020-02-14 | 哈尔滨红光锅炉总厂有限责任公司 | High-temperature and high-pressure steam boiler of pure-burning biomass environment-friendly circulating fluidized bed |
| CN111561695A (en) * | 2020-05-20 | 2020-08-21 | 沈阳东管电力科技集团股份有限公司 | Boiler flue gas and air system |
| CN111664445A (en) * | 2020-07-10 | 2020-09-15 | 青岛特利尔环保集团股份有限公司 | Semi-coke powder circulating fluidized bed boiler based on material heat balance |
| CN111795379A (en) * | 2020-08-07 | 2020-10-20 | 无锡华光环保能源集团股份有限公司 | Circulating fluidized bed boiler for burning biomass |
| CN114484490A (en) * | 2022-01-17 | 2022-05-13 | 柏乡县热华能源科技有限公司 | Self-cooling direct-pushing feeding device suitable for biomass |
| CN116182153A (en) * | 2022-12-29 | 2023-05-30 | 哈尔滨红光锅炉总厂有限责任公司 | Downward side cutting type hearth outlet smoke window structure of energy-saving circulating fluidized bed boiler |
| CN116972382A (en) * | 2023-09-22 | 2023-10-31 | 河南华泰石化装备股份有限公司 | Ultralow-emission energy-saving environment-friendly biomass boiler and combustion method |
| CN116972382B (en) * | 2023-09-22 | 2023-12-19 | 河南华泰石化装备股份有限公司 | Ultralow-emission energy-saving environment-friendly biomass boiler and combustion method |
| CN117588755A (en) * | 2023-12-27 | 2024-02-23 | 中科合肥煤气化技术有限公司 | Circulating fluidized bed incinerator system and method for recycling low-heating value gasified fly ash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110260301B (en) | 2024-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110260301A (en) | The energy-saving biomass recirculating fluidized bed boiler of minimum discharge | |
| CN102628590B (en) | Biomass circulating fluidized bed direct combustion apparatus | |
| CN102588959B (en) | Gas-solid separator of recirculating fluidized bed boiler and boiler comprising same | |
| CN203628635U (en) | Supercritical circulating fluidized bed boiler | |
| CN204388046U (en) | Biomass recirculating fluidized bed boiler | |
| CN204554801U (en) | Circulating fluid bed boiler secondary air hierarchical arrangement system | |
| CN202082915U (en) | W-shape flame boiler with grading secondary air layout structure | |
| CN202613429U (en) | Biomass circulating fluidized bed direct-burning device | |
| CN104654289B (en) | A kind of crop straw burning fluidized-bed combustion boiler | |
| CN206410126U (en) | Middle temperature separating circulating fluidized bed boiler for the high sodium coal that burns | |
| CN105042578B (en) | Coal and offal multi-fuel fired boiler and its pollutant catabolic gene method | |
| CN204786354U (en) | Combustion system of wall opposed firing boiler security and economic nature around improving | |
| CN208042121U (en) | A kind of pulverized coal particle recirculating fluidized bed combustion system | |
| CN210462983U (en) | Ultralow-emission energy-saving biomass circulating fluidized bed boiler | |
| CN207750966U (en) | A kind of new combustion chaff-fired boiler | |
| CN206037022U (en) | Biomass circulating fluid bed boiler arranges sediment device | |
| CN205299497U (en) | Hierarchical sorting combustion system of circulating fluidized bed fuel thickness | |
| CN105135422B (en) | Biomass molding fuel and offal multi-fuel fired boiler and its pollutant catabolic gene method | |
| CN207486774U (en) | A kind of high sodium coal two-stage medium temperature separation recirculating fluidized bed wet steamer of pure combustion | |
| CN207486769U (en) | A kind of high sodium coal two-stage medium temperature separation recirculating fluidized bed superheated steam boiler of pure combustion | |
| CN205504967U (en) | Biomass circulating fluidized bed boiler | |
| CN211694854U (en) | W flame boiler low-nitrogen combustion and slagging-proof flue gas recirculation system | |
| CN209263010U (en) | A kind of turbulent burner and turbulent burner idle air spray into system | |
| CN206094050U (en) | A air distribution system for CFB flue gas emergence equipment | |
| CN106287686A (en) | Biomass recirculating fluidized bed boiler slag-draining device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Cao Deming Inventor after: Shen Hongju Inventor after: Cao Yixin Inventor after: Cao Xigong Inventor after: Wang Haiquan Inventor after: Fu Mingyue Inventor after: Guo Baoguo Inventor after: He Weiwei Inventor after: Zhang Jingyao Inventor after: Ma Yuru Inventor before: Cao Deming Inventor before: Cao Yixin Inventor before: Cao Xigong Inventor before: Wang Haiquan Inventor before: Guo Baoguo Inventor before: He Weiwei Inventor before: Zhang Jingyao Inventor before: Ma Yuru Inventor before: Shen Hongju |
|
| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240131 Address after: 453700 No. 271 Yellow River Avenue, Zhaipo Town, Xinxiang County, Xinxiang City, Henan Province Applicant after: Henan Huatai Petrochemical Equipment Co.,Ltd. Country or region after: China Address before: Room 118, Building 7, No. 40 Yihe Road, Zhongyuan District, Zhengzhou City, Henan Province, 450000 Applicant before: Cao Deming Country or region before: China |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |